Is this real gold or plated?

It is solid 10K gold, so the metal is gold throughout rather than a coating over brass or steel. That means it will not wear down to a base metal.

How does 10K gold compare with 14K?

10K is about 41.7 percent gold, so it is harder and more scratch-resistant but slightly paler in color than 14K. It costs less than higher-karat gold while still being real gold.

What length is it and where does it sit?

It is 18 inches, which typically rests at or just below the collarbone on most adults. That length works well with crew necks and open collars.

Can I wear it every day, including in the shower?

Solid gold tolerates water and sweat far better than plated jewelry. Rinse and dry it after swimming in chlorinated or salt water to keep it bright.

Can I put a pendant on it?

A box chain has small, tight links, so it fits pendants with a fine jump ring or bail. Check that the pendant's bail is thin enough to slide over the links.